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Resistances to Turnip Mosaic Potyvirus in Arabidopsis thaliana

November 1999 , Volume 12 , Number  11
Pages  1,016 - 1,021

áfrica Martín Martín , Héctor Luis Cabrera y Poch , David Martínez Herrera , and Fernando Ponz

INIA, Dpto. Mejora Genética y Biotecnología, Autopista A-6, Km 7, 28040 Madrid. Spain

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Accepted 22 July 1999.

The responses of a collection of Arabidopsis thaliana eco-types to mechanical inoculation with turnip mosaic poty-virus were assessed. The virus induced characteristic severe symptoms of infection in systemically infected plants. Resistance was found in four ecotypes: Bay-0, Di-0, Er-0, and Or-0. Enzyme-linked immunosorbent assay results of the resistant ecotypes suggested that ecotypes Di-0, Er-0, and Or-0 actually consist of mixed genotypes with resistances acting at different levels in the virus life cycle. Another form of resistance was found in ecotype Bay-0, for which several lines of evidence indicated an interference with viral cell-to-cell movement in the inoculated leaves.

© 1999 The American Phytopathological Society